Looking for a SparkPost (now Bird) alternative that accepts Bitcoin or crypto? KingSMTP is one of the few transactional SMTP services where you can pay with Bitcoin, USDT or Monero — no KYC, no credit card, transparent pricing.
Why switch from SparkPost / Bird?
- SparkPost does not accept cryptocurrency — only credit card
- SparkPost was acquired by Bird (MessageBird) — users report worse service, higher prices, slower support after acquisition
- Pricing is no longer transparent — custom pricing only, no public pricing page
- Geared toward enterprise/high-volume senders — overkill and expensive for smaller senders
- KYC required, US jurisdiction
KingSMTP vs SparkPost
| Feature | KingSMTP | SparkPost (Bird) |
|---|---|---|
| Free trial | 7 days, no credit card | Limited free tier |
| Crypto payment | Yes (BTC, USDT, XMR) | No |
| KYC required | No | Yes |
| Privacy-focused | Yes — outside EU/US | No — US jurisdiction |
| Transparent pricing | Yes | No — custom/enterprise only |
| Suitable for small/medium | Yes | No — enterprise focus |
| Email routing (MX) | Yes | No |
| Stable ownership | Yes — bootstrapped since 2017 | No — acquired, uncertain direction |
| Open-source infrastructure | Yes (Postal) | No |
Why developers choose KingSMTP as a SparkPost alternative
- Pay with Bitcoin or crypto — no bank, no KYC, no restrictions
- Transparent pricing — no sales calls, no custom quotes
- Privacy-first — hosted outside US jurisdiction
- Built for small and medium senders — not an enterprise product
- Free 7-day trial — no credit card needed
- 99% inbox rate — clean IPs, DKIM/SPF included
Pricing
| Monthly volume | Price per year | Price per month |
|---|---|---|
| Up to 5,000 emails | $49 / year | Annual only |
| Up to 10,000 emails Popular | $79 / year | Annual only |
| Up to 20,000 emails | $159 / year | Annual only |
| Up to 50,000 emails | $489 / year | $49 / month |
| Up to 100,000 emails | $989 / year | $99 / month |
| 100,000+ emails | Custom pricing | Custom pricing |
FAQ
Can I pay for SMTP with Bitcoin instead of credit card?
Yes. KingSMTP accepts Bitcoin, USDT, Monero and other cryptocurrencies. No credit card required.
Is KingSMTP a good SparkPost alternative?
Yes — especially if you want transparent pricing, crypto payment, or a service that is not enterprise-only.
Is there a free trial?
Yes — 7 days, no credit card, no KYC.
Does KingSMTP require identity verification?
No. You only need a domain to get started.